IWATE University  Faculty of Science and Engineering  Department of Chemistry and Biological Science  Studies in Chemistry 


Associate Professor

Laboratory Address


Laboratory Phone number


Mail Address

E-mail address

Graduate School 【 display / non-display


    Iwate University  Graduate School, Division of Engineering  Frontier Materials and Function Engineering  Doctor's Course  Completed


    Others  Graduate School, Division of Engineering  Master's Course  Completed

Degree 【 display / non-display

  • Iwate University -  Doctor(Engineering)  2012.09.23

Campus Career 【 display / non-display

  • 2020.04

    IWATE University   Faculty of Science and Engineering   Department of Chemistry and Biological Science   Studies in Chemistry   Associate Professor   [Duty]

  • 2020.04

    IWATE University   Center for Hiraizumi Studies   Associate Professor   [Concurrently]

Research Areas 【 display / non-display

  • Nanotechnology/Materials / Composite materials and interfaces


Course Subject 【 display / non-display

  • 2020

    Chemistry and Bioengineering Laboratory 1

  • 2020

    "Exercises in Chemistry

  • 2021

    Graduation Research

  • 2021

  • 2021

    Basic Seminar for the first-year students

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Published Papers 【 display / non-display

  • Preparation of hollow nanosphere of 5-fluorouracil/layered double hydroxide and its cellular cytotoxicity

    Sumio Aisawa, Jing Sang, Daisuke Suga, Hidetoshi Hirahara, Eiichi Narita

    Applied clay science   226   106575   2022.09  [Refereed]

    Academic Journal  Multiple authorship

  • Superhydrophobic and Conductive Cotton Fabric Composite with Excellent Corrosion Resistance for Wearable Electronics

    Zhixin Kang, Yeqing He, Jing Sang, Hidetoshi Hirahara, Dexin Chen

    Advanced materials interfaces   8 ( 17 ) 2100651   2021.08  [Refereed]

    Academic Journal  Multiple authorship

    Herein, a superhydrophobic and highly conductive cotton fabric (CF) composite with outstanding corrosion resistance for wearable textile electronics is developed. The fabrication process of the fabric composite involves spraying deposition and electrodeposition. Ag nanoparticles (AgNPs) are first synthesized on cotton fibers surface via two components spraying, forming cotton fibers core/AgNPs shell structure. The CF/ AgNPs composite is then covered with a layer of cerium myristate
    (CeM) by electrodeposition, which endows the composite with superhydrophobicity and outstanding corrosion resistance. The resistivity of CF/AgNPs/CeM composite could reach as low as 0.106 Ω mm. Moreover, the obtained CF/AgNPs/CeM composite exhibits excellent self-cleaning property and superhydrophobicity with a contact angle
    (CA) of 158.4°. Also, it maintains superhydrophobicity (CA > 150°) after 60 cm abrasion test or immersion in strong acidic/alkaline solution
    (pH = 1 or 13) for 24 h. In addition, the corrosion current density of conductive fabric composite (CFC) after electrodeposition decreases
    to 4.79% of the original value in simulated sweat corrosive media, suggesting a significant improvement of anti-corrosion. The developed superhydrophobic CFC with excellent corrosion resistance and self- cleaning performance has promising applications for wearable electronics in harsh conditions.


  • A kinetic analysis of intercalation of organic sulfate anions into layered double hydroxide using quartz crystal microbalance with layered double hydroxide-immobilized electrode

    Sumio AISAWA, Jing SANG, Yuya NITANAI, Hidetoshi HIRAHARA, Eiichi NARITA

    Journal of the Ceramic Society of Japan   129 ( 7 ) 470 - 477   2021.07  [Refereed]

    Academic Journal  Multiple authorship

    To investigate a dynamic intercalation behavior of organic anions into layered double hydroxide (LDH) interlayer by ion-exchange, a quartz crystal microbalance (QCM) with the Mg-Al LDH thin film immobilized gold disc (LDH/QC) electrode has been used. A stable minute LDH film was prepared by using translucent aqueous sol of LDH containing OH- ions and magnesium acetate molecule in the interlayer and immobilized on the gold disc after pretreatment of the surface of the supporting silica electrode with hydrophobic agent. In the kinetic analysis, alkyl sulfates having n-alkyl chain (CnH2n+1, n = 5-12; abbreviated as CnS) were used as guest anions. As the results, the time-dependence on CnS intercalation by ion-exchange with guest OH- ions and magnesium acetate molecules was measured in the cases of CnS (n .GEQ. 7), and the data of C11S and C12S intercalation were successively analyzed using the rate equation based on the reversible pseud first-order reaction. Finally, the instrumental analyses of the LDH films before and after the intercalation of C12S revealed that the organic anions could be intercalated into the LDH interlayer of the LDH/QC electrode in each aqueous solutions.

  • Interfacial Molecular Motion and Chemical Characteristics of Polymer Jointed to Metal by Chemical Bonding

    Xueliang Deng, Jing Sang, Sumio Aisawa, Kastuhito Mori , Hidetoshi Hirahara

    Journal of the Japan Society of Colour Material   96 ( 6 ) 149 - 157   2021.06  [Refereed]

    Academic Journal  Multiple authorship

    シリコンゴムと Al が接触方式による放熱材料の熱伝導性,接着剤による接合での熱伝導性,そし て界面化学結合により創成したシリコンゴムとAl 複合体の化学接合方式による熱伝導特性への影響を評価す ることによって,ヒートシンクと放熱材料,および放熱材料と熱源の界面の接触熱抵抗の影響を解明してい る。シリコンゴムと Al 複合体の熱伝導特性におよぼすシリコンゴム架橋剤添加量とシリコンゴム厚さの影響 について検討した。シリコンゴムと Al の接触方式による熱伝導性と接着剤による接合での熱伝導性,そして 分子接合剤により界面化学結合させたシリコンゴムとAl複合体の化学接合方式によって熱伝導特性が異なるこ とを解明し,化学結合を用いて接合したシリコンゴムとAl複合体放熱材料はシリコンゴムとヒートシンク (Al) 材料の接触熱抵抗の減少に有効であることを明らかにした。


    Sumio Aisawa, Jing Sang, Ayaka Masubuchi, Hidetoshi Hirahara, Eiichi Narita

    Clay Science   24 ( 2-4 ) 47 - 54   2021.02  [Refereed]

    Academic Journal  Multiple authorship

    The intercalation behavior of vanillin (VL), one of the most famous flavoring components having aldehyde structure, and its related compounds, m-anise aldehyde (MA) and 2- methoxyphenol (MP), into Mg-Al layered double hydroxide (LDH) has been examined by the calcination-rehydration (reconstruction) method using LDH oxide precursor at 25.DEG.C for 24 h. The molar ratio of the organic guest in aqueous solution to Al3+ ion in LDH oxide was set at 1.00 in all the experiments. The solid product was found to incorporate the guest depend on its structure together with hydroxide ion and to show the restorable LDH structure. The amounts of the organic guest intercalated (the guest/Al molar ratio of the solid product) were as follows: VL (0.81)>MP (0.41)>MA (0.18), and the effect of each substituent group of the guests was also discussed. In the case of vanillin isomers, the intercalated amounts were differently in the order; VL (0.81)>ortho-vanillin (0.58)>iso-vanillin (0.35), whereas the intercalated amounts of anise isomers were, on the whole, lower than VL isomers as MA (0.18)>ortho-anise (0.034)>para-anise (0.012). The XRD patterns of the solid products showed that VL was intercalated as a monovalent anion to make bilayer and to keep horizontal orientation for the LDH basal layer, and the others were intercalated to keep parallel orientation in the interlayer. Moreover, the results of the guest deintercalation (release) experiments from the solid products by ion exchange with chloride or carbonate ion revealed that the easier intercalated guest, the more difficult released one from the solid products.

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Academic Awards Received 【 display / non-display

  • 2021.09.14